논토양의 화학성과 질의 장기 변동

국문 초록 (Abstract)

지속농업은 환경의 건전성과 균형을 유지하는 것에 좌우된다. 본 연구는 농촌진흥청과 전국 도 농업기술원이 공동으로 전국 논토양의 화학성분 함량의 현황과 장기적인 변화양상을 파악하기 위하여 1999년부터 4년 1주기로 모니터링한 결과, 토양 화학성 변동 해석과 그에 따른 토양의 질 지표의 변화정도를 예측하고자 수행하였다. 2007년에 조사한 전국 논토양 2,070 지점의 평균 화학성은 pH 5.8, 유기물 24 g kg<SUP>-1</SUP>, 유효인산 132mg kg<SUP>-1</SUP>, 유효규산 126 mg kg<SUP>-1</SUP>이었고, 치환성 칼륨,칼슘 및 마그네슘은 각각 0.32, 4.7, 1.3 cmolc kg<SUP>-1</SUP>이었다. 장기적인 변화에서는 pH는 약간 증가하였으나 치환성 칼륨은 다소 감소하였다. 그러나, 치환성 칼슘과 유효규산 함량은 지속적으로 가장 많이 증가하였다. 그리고 논토양의 화학성 질 지표는 2007년까지 점점 향상되고 있었으며 유효규산의 질 지표 변화량이 가장 높아 전체 질 지표에 미치는 영향이 가장 컸음을 알 수 있었다.

다국어 초록 (Multilingual Abstract)

There is very important to investigate long-term trend of soil chemical properties and quality index for sustainable agriculture and production of agricultural safety products. Monitoring on soil chemical properties in paddy soils was conducted as one cycle with 4 years from 1999 to 2007. Paddy soil samples were taken from 4,007, 1,970, 2,070 sites in 1999, 2003 and 2007, respectively. With these data, soil quality index (SQI) was evaluated by method that Yoon et al suggested in 2004. Chemical properties of paddy soils were 5.8 for pH, 24 g kg<SUP>-1</SUP> for organic matter, 132 mg kg<SUP>-1</SUP> for available phosphate, 0.29 cmolc kg<SUP>-1</SUP> for exchangeable potassium, 4.7 cmolc kg<SUP>-1</SUP> for exchangeable calcium, 1.3 cmolc kg<SUP>-1</SUP> for exchangeable magnesium and 126 mg kg<SUP>-1</SUP> for available silicate in 2007. Long-term change was shown that pH has increased gradually whereas exchangeable potassium has decreased. However, reasonably large changes were found. Exchangeable calcium and available silicate level in 1999 was 4.0 cmolc kg<SUP>-1</SUP>, 86 mg kg<SUP>-1</SUP>, but had risen to 4.7 cmolc kg<SUP>-1</SUP>, 126 mg kg<SUP>-1</SUP> in 2007, respectively. The change of paddy soils quality index was increased gradually and increasement of silicate quality index was higher than other quality indicators.

목차 (Table of Contents)

• 서언
• 재료 및 방법
• 결과 및 고찰
• 요약
• 인용문헌

참고문헌 (Reference)

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